Kia ora, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for Waitomo Glowworm Caves.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
Waitomo Glowworm Caves
Valid Reviews
290 Valid Reviews
The Waitomo Glowworm Caves experience has a total of 291 reviews. There are 290 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 290 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 36 |
|
12% |
| 9/10 | 52 |
|
18% |
| 8/10 | 81 |
|
28% |
| 7/10 | 66 |
|
23% |
| 6/10 | 22 |
|
8% |
| 5/10 | 13 |
|
4% |
| 4/10 | 8 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
1% |
| 1/10 | 3 |
|
1% |
75.62% Average
The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.62% and is based on 290 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Face-to-Face Reviews
263 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
More about face-to-face reviews
Within the 290 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 263 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 29 |
|
11% |
| 9/10 | 49 |
|
19% |
| 8/10 | 76 |
|
29% |
| 7/10 | 57 |
|
22% |
| 6/10 | 21 |
|
8% |
| 5/10 | 13 |
|
5% |
| 4/10 | 7 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
2% |
| 1/10 | 2 |
|
1% |
75.36% Average
The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
75.84%
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
| Reviewer | Rating | Age | Relative Weight |
|---|---|---|---|
| Somysolanki | 7/10 | 567 days | 100% |
| Anne | 7/10 | 902 days | 66% |
| ros fraser | 4/10 | 2912 days | 2% |
| wynden | 1/10 | 2940 days | 2% |
| Rado Hank | 10/10 | 3027 days | 3% |
| Lizzie Edmonds | 8/10 | 3028 days | 3% |
| Anis Quentin | 7/10 | 3035 days | 3% |
| Jeny Smolders | 7/10 | 3039 days | 3% |
| Oscar Petersen | 8/10 | 3046 days | 3% |
| Ani | 9/10 | 3155 days | 3% |
| Martin Murlik | 8/10 | 3267 days | 3% |
| Laura | 9/10 | 3278 days | 3% |
| Melanie Farrell | 7/10 | 3286 days | 3% |
| Andy | 10/10 | 3293 days | 3% |
| Julia Achatz | 5/10 | 3307 days | 2% |
| Auba Mateos | 7/10 | 3313 days | 3% |
| Charlotte | 7/10 | 3313 days | 3% |
| Isabel Zedelius | 8/10 | 3316 days | 3% |
| Dries | 8/10 | 3356 days | 3% |
| Clarissa Glaser | 8/10 | 3357 days | 3% |
| Alna | 10/10 | 3362 days | 3% |
| Holger Worner | 9/10 | 3362 days | 3% |
| Karlee Hormell | 9/10 | 3371 days | 3% |
| Alonso | 9/10 | 3375 days | 3% |
| Rose Guillaume | 8/10 | 3378 days | 3% |
| Caroline Coudray | 8/10 | 3382 days | 3% |
| Barbara | 8/10 | 3382 days | 3% |
| Leonie Brabers | 7/10 | 3390 days | 2% |
| Bina Johansson | 10/10 | 3390 days | 3% |
| Sam Staines | 9/10 | 3394 days | 3% |
| Erik | 6/10 | 3397 days | 2% |
| Nicole Signer | 8/10 | 3404 days | 2% |
| Sam Taylor | 7/10 | 3408 days | 2% |
| Vanuxem | 8/10 | 3612 days | 2% |
| Clara Bertomeu | 10/10 | 3612 days | 2% |
| Lukas Boller | 9/10 | 3614 days | 2% |
| Mette Elholm | 7/10 | 3628 days | 2% |
| Mathilde Arp | 8/10 | 3628 days | 2% |
| Chloe and Guillame | 9/10 | 3632 days | 2% |
| Andre | 9/10 | 3634 days | 2% |
| Doerte | 10/10 | 3634 days | 2% |
| Saskia Peek | 9/10 | 3635 days | 2% |
| Erika Tarant | 8/10 | 3635 days | 2% |
| Jennifer Nguyen | 7/10 | 3636 days | 2% |
| Julie Duvert | 7/10 | 3636 days | 2% |
| Dan Ramsl | 4/10 | 3636 days | 1% |
| Lucy Mulvin | 7/10 | 3637 days | 2% |
| Fine Kochling | 9/10 | 3639 days | 2% |
| Eberhard | 9/10 | 3639 days | 2% |
| Hannes | 8/10 | 3640 days | 2% |
| Calum Penn | 9/10 | 3642 days | 2% |
| Arthur Portolleau | 6/10 | 3643 days | 2% |
| Elisabet | 10/10 | 3644 days | 2% |
| Tommy Mannien | 8/10 | 3645 days | 2% |
| Solange Bourbeois | 8/10 | 3648 days | 2% |
| Talissa Missiato | 10/10 | 3648 days | 2% |
| Severin Knegsch | 9/10 | 3649 days | 2% |
| Pierre Jouffineau | 10/10 | 3650 days | 2% |
| Lewis Whittle | 8/10 | 3652 days | 2% |
| Ben and Pauline | 8/10 | 3654 days | 2% |
| Ann-Kathrin | 7/10 | 3659 days | 2% |
| Natasha Harbinson | 10/10 | 3660 days | 2% |
| Sebastian | 2/10 | 3661 days | 1% |
| Jaquein Bucholz | 3/10 | 3661 days | 1% |
| Chiara | 7/10 | 3661 days | 2% |
| Cariotta Kemper | 3/10 | 3661 days | 1% |
| Megan Lenox | 7/10 | 3664 days | 2% |
| Max Mustermann | 8/10 | 3666 days | 2% |
| Amy Stafford | 8/10 | 3669 days | 2% |
| Carl | 7/10 | 3669 days | 2% |
| Briony | 7/10 | 3671 days | 2% |
| Melanie Kronbichler | 8/10 | 3672 days | 2% |
| Andreas Schiefer | 7/10 | 3673 days | 2% |
| Veronique Kaplan | 3/10 | 3675 days | 1% |
| Robin Ings | 6/10 | 3676 days | 2% |
| Stula Vladimir | 7/10 | 3677 days | 2% |
| David Soukal | 8/10 | 3677 days | 2% |
| Olivia Aliprandi | 7/10 | 3678 days | 2% |
| Isabelle | 2/10 | 3680 days | 1% |
| Jonathan Gourmel | 8/10 | 3680 days | 2% |
| Mikkel Palleson | 4/10 | 3683 days | 1% |
| Franziska and Sabine | 7/10 | 3684 days | 2% |
| Chloe Guerillot | 7/10 | 3684 days | 2% |
| Faye Oliver | 7/10 | 3686 days | 2% |
| Iris Kerbler | 9/10 | 3686 days | 2% |
| Til Schaebitz | 6/10 | 3687 days | 2% |
| Elisabeth Grabner | 9/10 | 3689 days | 2% |
| Berith | 10/10 | 3689 days | 2% |
| Chris Simpson | 6/10 | 3692 days | 2% |
| Pekka and Jonna | 9/10 | 3692 days | 2% |
| Jonas Hoerning | 8/10 | 3693 days | 2% |
| Nils | 10/10 | 3693 days | 2% |
| Mark Rosema | 8/10 | 3694 days | 2% |
| Lisa Huber | 10/10 | 3694 days | 2% |
| Nicola Wiggan | 9/10 | 3715 days | 2% |
| Linda and Gunther | 4/10 | 3716 days | 1% |
| Julie | 9/10 | 3717 days | 2% |
| Maria Schaer | 7/10 | 3721 days | 2% |
| Mette and Jesper | 5/10 | 3723 days | 1% |
| Pierre and Alexandra | 6/10 | 3729 days | 1% |
| Julia Waenninger | 8/10 | 3741 days | 2% |
| Sarah Boettcher | 9/10 | 3777 days | 2% |
| Suzanne Vermeulen | 6/10 | 3794 days | 1% |
| Blandine Giusti | 7/10 | 3997 days | 1% |
| Bart Hanssen | 6/10 | 4076 days | 1% |
| Astrid Egesten | 7/10 | 4128 days | 1% |
| Jean Curry | 9/10 | 4351 days | 0% |
| Carla Oyarzun | 1/10 | 4355 days | 0% |
| Philippe Chiasson | 9/10 | 4361 days | 0% |
| Helma Druyken | 4/10 | 4371 days | 0% |
| Florian Guttler | 7/10 | 4374 days | 0% |
| Casandra Prunica | 8/10 | 4375 days | 0% |
| Lauren Hedley | 7/10 | 4375 days | 0% |
| Janina Zwerver | 8/10 | 4375 days | 0% |
| Marieke Feyteres | 4/10 | 4379 days | 0% |
| van Linda Werner | 5/10 | 4379 days | 0% |
| Philip Donachie | 7/10 | 4389 days | 1% |
| Luisa Bach | 8/10 | 4389 days | 1% |
| Kristina | 7/10 | 4391 days | 1% |
| Eugen Lehner | 6/10 | 4392 days | 1% |
| Manuel Bach | 7/10 | 4392 days | 1% |
| Matthias Freiling | 2/10 | 4399 days | 1% |
| Debora Grusler | 6/10 | 4402 days | 1% |
| Andreas Brodhaeker | 8/10 | 4415 days | 1% |
| Renee van der Syde | 7/10 | 4416 days | 1% |
| Martha Horst | 8/10 | 4416 days | 1% |
| Roland Beer | 7/10 | 4420 days | 1% |
| Johanna Bak | 4/10 | 4420 days | 1% |
| Lior Bakski | 9/10 | 4430 days | 1% |
| Bet | 9/10 | 4431 days | 1% |
| Memain | 8/10 | 4704 days | 1% |
| Konza | 7/10 | 4705 days | 1% |
| Steen Rausmussen | 8/10 | 4736 days | 1% |
| David Restell | 10/10 | 4766 days | 1% |
| Christina Rodewald | 9/10 | 4771 days | 1% |
| Hanneke P | 7/10 | 4797 days | 1% |
| Kohler | 9/10 | 4817 days | 1% |
| Alexandra van den Brack | 6/10 | 4825 days | 1% |
| Paul Lawrence | 9/10 | 4826 days | 1% |
| Abby Rushmer | 7/10 | 4827 days | 1% |
| Stephan Olivier | 7/10 | 4832 days | 1% |
| Stephan Olivier | 7/10 | 4832 days | 1% |
| Faassen | 8/10 | 4836 days | 1% |
| Julie Lamart | 8/10 | 4837 days | 1% |
| Adrian Weidell | 5/10 | 5033 days | 1% |
| Jonathan Tuthill | 9/10 | 5088 days | 1% |
| A Ormsby | 10/10 | 5100 days | 1% |
| Gillian Rowe | 10/10 | 5113 days | 1% |
| Ryan Pynappels | 8/10 | 5114 days | 1% |
| Peter Dellen | 8/10 | 5115 days | 1% |
| Jorg Steffens | 8/10 | 5115 days | 1% |
| Danielle & Jobbe | 9/10 | 5117 days | 1% |
| Christina | 6/10 | 5118 days | 1% |
| Jop Veldhuis | 7/10 | 5118 days | 1% |
| Paul Weidenfeld | 8/10 | 5119 days | 1% |
| Sophie Dorrepaal | 7/10 | 5119 days | 1% |
| Fannette Peyreplane | 5/10 | 5120 days | 1% |
| Norm Cooper | 7/10 | 5124 days | 1% |
| Gloria, Rose & An | 8/10 | 5124 days | 1% |
| A Sorg | 10/10 | 5124 days | 1% |
| Samplonius | 5/10 | 5127 days | 1% |
| Petra | 10/10 | 5127 days | 1% |
| Bethany Hamilton | 8/10 | 5131 days | 1% |
| suffolkhouse69 | 9/10 | 5132 days | 1% |
| a a | 8/10 | 5163 days | 1% |
| Julia Balionis | 7/10 | 5177 days | 1% |
| Julia Hartman | 3/10 | 5178 days | 1% |
| Fabienne Indergand | 7/10 | 5198 days | 1% |
| Waldemar Schuler | 9/10 | 5210 days | 1% |
| pepette31 | 7/10 | 5285 days | 1% |
| Craig Hathaway | 9/10 | 5437 days | 1% |
| Stephane Lebel | 9/10 | 5442 days | 1% |
| Rens Hemselmans | 7/10 | 5455 days | 1% |
| Isabell | 10/10 | 5457 days | 1% |
| Holly Cave | 5/10 | 5457 days | 1% |
| J Palmer | 6/10 | 5461 days | 1% |
| Liz & Jim | 10/10 | 5463 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5465 days | 1% |
| Simon Vickers | 2/10 | 5468 days | 1% |
| Leslie | 8/10 | 5481 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5482 days | 1% |
| Selina Mueller | 7/10 | 5483 days | 1% |
| Tamlin Barton | 3/10 | 5484 days | 1% |
| Cara Dungay | 8/10 | 5485 days | 1% |
| Bottcher | 10/10 | 5485 days | 1% |
| Alexandra | 10/10 | 5486 days | 1% |
| Philipp Rau | 7/10 | 5488 days | 1% |
| Dan Aldridge | 9/10 | 5490 days | 1% |
| John Allen | 8/10 | 5492 days | 1% |
| Curtis Penner | 8/10 | 5492 days | 1% |
| Brandt | 8/10 | 5494 days | 1% |
| Nadia Husain | 5/10 | 5497 days | 1% |
| T J Andrews | 6/10 | 5513 days | 1% |
| Charli Skinner | 7/10 | 5764 days | 1% |
| Carl_Larsen | 10/10 | 5773 days | 1% |
| Susan & Richard | 10/10 | 5834 days | 1% |
| Rik | 9/10 | 5835 days | 1% |
| Jonathan Martin | 7/10 | 5837 days | 1% |
| Gunda G | 9/10 | 5842 days | 1% |
| Aaron | 8/10 | 5844 days | 1% |
| Will Jemma | 6/10 | 5847 days | 1% |
| Christen Hans | 10/10 | 5848 days | 1% |
| Monica and Danie. | 7/10 | 5856 days | 1% |
| Stephen | 5/10 | 5858 days | 1% |
| Susan | 10/10 | 5858 days | 1% |
| snodge | 8/10 | 5862 days | 1% |
| Bo Moenstead | 9/10 | 5871 days | 1% |
| Alain Deslandres | 8/10 | 5875 days | 1% |
| Jakob Jurgen | 10/10 | 5876 days | 1% |
| EA Anders | 8/10 | 5879 days | 1% |
| Helen and Hans Walser | 1/10 | 5882 days | 1% |
| kevinp | 8/10 | 5905 days | 1% |
| warrenp | 9/10 | 5909 days | 1% |
| braunweiler | 9/10 | 5913 days | 1% |
| pimn | 9/10 | 5918 days | 1% |
| asiacritics | 7/10 | 5924 days | 1% |
| Chris Mackamul | 8/10 | 5931 days | 1% |
| Debbie Rathbone | 10/10 | 5931 days | 1% |
| Lisette X | 9/10 | 5932 days | 1% |
| Martin | 10/10 | 5934 days | 1% |
| Thomas Willi | 10/10 | 5934 days | 1% |
| Elodie | 7/10 | 5935 days | 1% |
| richardh | 7/10 | 6049 days | 1% |
| trvlbug | 8/10 | 6077 days | 1% |
| glennandjen | 10/10 | 6138 days | 1% |
| BryonyS | 9/10 | 6156 days | 1% |
| Marion | 9/10 | 6172 days | 1% |
| Mikey | 7/10 | 6173 days | 1% |
| Richard Komzik | 6/10 | 6174 days | 1% |
| Michael Walsall | 10/10 | 6178 days | 1% |
| Anna | 8/10 | 6192 days | 1% |
| Abigail | 7/10 | 6192 days | 1% |
| lannie | 7/10 | 6202 days | 1% |
| SimonR | 8/10 | 6202 days | 1% |
| SonjaG | 7/10 | 6202 days | 1% |
| Chris | 8/10 | 6208 days | 1% |
| AurelieD | 8/10 | 6215 days | 1% |
| Yunker | 10/10 | 6216 days | 1% |
| Andrew | 8/10 | 6219 days | 1% |
| Erin | 9/10 | 6219 days | 1% |
| Christopher Gallaga | 8/10 | 6224 days | 1% |
| Amy | 10/10 | 6230 days | 1% |
| Shona | 8/10 | 6230 days | 1% |
| plumbaum | 9/10 | 6233 days | 1% |
| Sandra | 10/10 | 6240 days | 1% |
| Evangelista | 8/10 | 6240 days | 1% |
| Oliver | 5/10 | 6242 days | 1% |
| Kat | 9/10 | 6272 days | 1% |
| Lisa | 8/10 | 6299 days | 1% |
| siobhan | 8/10 | 6301 days | 1% |
| Alice | 8/10 | 6301 days | 1% |
| NORTZ | 7/10 | 6330 days | 1% |
| Stefan | 8/10 | 6332 days | 1% |
| Hugh Trenchard | 9/10 | 6348 days | 1% |
| Niamh | 4/10 | 6355 days | 1% |
| Jenny | 9/10 | 6379 days | 1% |
| Louise | 8/10 | 6388 days | 1% |
| Peddy | 10/10 | 6397 days | 1% |
| Katie Wise | 8/10 | 6400 days | 1% |
| Thomas Bachmann | 8/10 | 6416 days | 1% |
| Daniala | 8/10 | 6435 days | 1% |
| Tom Ben | 9/10 | 6539 days | 1% |
| Sarah Maudsley | 8/10 | 6554 days | 1% |
| Alan Bellerby | 8/10 | 6554 days | 1% |
| Tina Daly | 5/10 | 6560 days | 1% |
| John Woodrow | 8/10 | 6569 days | 1% |
| Ernst Seter | 9/10 | 6569 days | 1% |
| Jim Curley | 7/10 | 6580 days | 1% |
| Daniel | 7/10 | 6581 days | 1% |
| Marc Hertogs | 7/10 | 6584 days | 1% |
| Laura Sutton | 5/10 | 6608 days | 1% |
| Jeroen | 5/10 | 6610 days | 1% |
| Mum! | 6/10 | 6610 days | 1% |
| Gail | 9/10 | 6614 days | 1% |
| Heike Julia | 6/10 | 6615 days | 1% |
| Lanni | 8/10 | 6615 days | 1% |
| Amanda Finger | 7/10 | 6616 days | 1% |
| Desiree Muri | 7/10 | 6616 days | 1% |
| Jan Grzejik | 8/10 | 6643 days | 1% |
| Wouter Ewalts | 8/10 | 6650 days | 1% |
| Matilde | 6/10 | 6658 days | 1% |
| Kim | 6/10 | 6855 days | 1% |
| Gillian | 8/10 | 6897 days | 1% |
| Denise Nick | 6/10 | 6907 days | 1% |
| ranker_110 | 8/10 | 6926 days | 1% |
| Jasper | 7/10 | 6933 days | 1% |
| Mary | 8/10 | 6933 days | 1% |
| Lucy | 6/10 | 6933 days | 1% |
| Lukas | 8/10 | 6944 days | 1% |
| Hanna | 7/10 | 6946 days | 1% |
Adjustments
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
Sample Size Adjustment
No Adjustment
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.15% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 53 days. However the Waitomo Glowworm Caves experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Waitomo Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.08% |
| 198 | -4.10% |
| 199 | -4.13% |
| 200 | -4.15% |
| 201 | -4.17% |
| 202 | -4.19% |
| 203 | -4.21% |
| … | … |
Balancing Adjustment
6.11% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
78%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.